Aer Turas
If the cabin crew are unaware of the "dead mans bolt" how come they manage to lock and unlock the toilets during landing and take-off using the very concept you describe? Perchance this case had more to do with the fact that the casualty was slumped on the floor and the crew were unable to open the (inward opening) door?!
Back to the points "that may affect our jobs or lives as professional pilots".